The Everyday Song Book
Edition: Revised Edition
Publisher: The Cable Company
Published: 1922
Place of publication: Chicago, USA
Language: eng
Copyright date: 1922
Notes: This songbook from 1922 definitively established that "Happy Birthday To You" is in the public domain.  Despite despicable music monopolists collecting multiple millions of dollars in royalties for the song even though they never owned its copyright.  See: